WO2002061878A2 - Antenna arrangements for flexible coverage of a sector in a cellular network - Google Patents
Antenna arrangements for flexible coverage of a sector in a cellular network Download PDFInfo
- Publication number
- WO2002061878A2 WO2002061878A2 PCT/IB2002/001525 IB0201525W WO02061878A2 WO 2002061878 A2 WO2002061878 A2 WO 2002061878A2 IB 0201525 W IB0201525 W IB 0201525W WO 02061878 A2 WO02061878 A2 WO 02061878A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sector
- coverage
- cell
- shaping apparatus
- antenna
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0491—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity
Definitions
- the present invention in certain respects, relates to cellular communications, and in other respects relates to approaches for shaping the coverage of a cell in a
- an antenna arrangement is provided.
- the arrangement generates plural antenna beams
- Such an antenna arrangement may comprise two arrays, each forming an independently directable beam.
- Fig. 1 A is an overview schematic of a three-sector embodiment of a base station
- Fig. IB is a schematic diagram of an embodiment of a given antenna
- Fig. 2 is an illustration of example beam patterns that may be generated by the
- Fig. 3 is an illustration of the power-sum coverage of a base station
- Fig. 4 is a top view of an exemplary embodiment of one two-column array
- Fig. 5 is a partial front view of the two-column array of Fig. 4;
- Figs. 6A-6D are simulations of beam formation with the illustrated two-array
- Fig. 7 is a side view schematic of an operational receive sub-system capable of
- Fig. 8 is a side view schematic of a "load measurement" receive sub-system
- Fig. 9 is a functional diagram that illustrates a method of producing two independent beams with the embodiments of Fig. 7-8;
- Fig 10 is a more detailed block diagram of a receive sub-system; and Fig 11 is a more detailed block diagram of another receive sub-system.
- Fig. 1 shows one illustrated embodiment of an transmit and receive antenna arrangement 100 for a base station at a given cell.
- the figure shows parts of such antenna arrangement, including a given transmit antenna arrangement 150, 152 corresponding to a transmit portion of a given sector.
- a given antenna arrangement for a given sector has two arrays, each comprising a 2-column array (Tx col. 1 and Tx col. 2).
- a 2-column array may be similar in appearance to a single column array, and may have antenna elements that are vertically or cross-polarized, in Tx and/or Rx.
- Each array incorporates phase-shifters 110 that facilitate beam tilting (in elevation) as well as beam steering (in azimuth).
- Controllable attenuators 112 may be provided in the Tx and Rx paths, in cascade to the phase shifters ⁇ to provide further degrees of freedom to shape the Tx and Rx beams.
- each pair of 2-column arrays is placed from each other at a distance between lO ⁇ and 20 ⁇
- Fig. 1 A demonstrates a 3-sector cell with flexible directable antenna arrays.
- the angular coverage of the sectors 10, 12, and 14 although shown as uniform does not necessarily have to be uniform.
- the choice of angle between the bore sights of the pair of arrays in each sector offers an initial degree of freedom in changing the width of the sector coverage.
- Each array is then allowed to steer its beam electronically in a phased array mode, as shown by arrows 30-35. Synchronized beam steering provides coverage shifting to that sector, while unsynchronized steering changes the sector coverage width.
- each such array having two columns of antenna elements
- other types of arrays may be employed.
- an array arrangement may be provided that can direct at least one beam of a given sector in relation to the position of at least one other beam for the same given sector.
- the beam directing of each array may be combined with the coverage smoothing offered by the diversity reception and transmission that combine the coverage of the individual arrays into a smooth and continuous coverage within and between the sectors. This is further explained in the following.
- Each 2-column array forms a beam by coherently combining (in Rx) the received signals from each column, or coherently dividing (in Tx) the transmitted signal into the two columns through a phase shift network.
- Rx coherently combining
- Tx coherently dividing
- each 2-column array is steered independently, and the sum (diversity-combining) of the power coverage in azimuth determines the sector coverage, as seen in Fig. 2B.
- a maximal-ratio-combining receiver (either at the base station or at the
- SNR signal-to-noise power ratio
- Fig. 2b denotes a mechanical
- This arrangement allows the coverage of a sector to extend much beyond 120°.
- the array pattern When transmitting the same radio frequency signal through two distant antennas (as is done in these embodiments) the array pattern will have many nulls and grating lobes, all changing in an unpredictable manner (in a practical installation). Therefore, in
- one of the two 2-column arrays transmits the original composite signal while the other 2-column array transmits a
- the diversity signal is a delayed version of the original signal. This method is called time-delay transmit-diversity (TDTD). A delay is
- PSTD Phase Swept Transmit Diversity
- STTD Transmit Diversity
- Orthogonal Coding etc.
- the coverage shaping of the cell may be controlled by several factors, including:
- any applicable transmit-diversity method may be utilized, instead of or in addition to the one illustrated above (namely TDTD).
- TDTD phase-swept transmit diversity
- STBC space-time block-codes
- FIG. 4 and 5 demonstrate a 2-column active array based on active multibeam arrays.
- the embodiment of the illustrated embodiments in the Rev. 4 personal communications system shown in the above Fig. emphasizes its simplicity; the interfacing with the BS sector is simple as for current systems.
- the provisions for TDTD are all at the out door equipment and no modifications are required at the BS or the MS.
- the sector coverage scheme is shown in Fig. 6.
- balanced cell are oriented around the 120° sectorization scheme.
- a beam squint of up to ⁇ 30° is possible with the 60° beam, formed by the antenna column pair (Fig. 2A).
- beams of two diversity arrays can be split by an offset angle ⁇ mechanically, as a pre ⁇
- the Tx diversity keeps the beams' signals uncorrelated and thus allows for their summation at the MS Rake receiver (Fig. 2B).
- FIG. 6A-6D A simple simulation of the beam forming is shown in Fig. 6A-6D (in addition to
- Fig. 1 are connected to the base-station via an RF switch assembly that are
- One such embodiment includes three
- a rough but simple estimate of the required link resources is given by measuring the total power transmitted and received. The objective is then to measure the received power as a function of the angle of arrival at the BTS antenna. The angular
- the information is the forward-link total transmitted power.
- the measurements of both forward and reverse links' power enable the optimum cell shaping control for load and
- the angular measurement of the MS location is the subject of the following part of the illustrated embodiments.
- the underlying method for the measurement of sector load distribution relies on the reverse-link power over thermal noise, measured in narrow beams that cover an angular part of the sector and scan the sector angular span.
- the angular location may be measured via each of the two methods outlined above, while scanning the sector with narrow Rx beams.
- the first embodiment i.e., the embodiment in Fig. 7
- the second embodiment i.e., the embodiment in Fig. 8
- two variations for its implementation a parallel and a cascade one
- an operational beam is a beam that serves for the cellular sector communications.
- a measurement beam is an auxiliary beam that serves only for power measurements in the reverse link.
- the embodiment illustrated in Fig. 7 uses the operational receive link per scanning beam (provided out of a 2-column active multibeam array). Since there is a tower-top low noise amplifier (LNA) at the antenna port, there is no problem in splitting (or coupling off a secondary receive channel) just for the reverse link power measurement. Each sector is equipped with two such squinted beams, and the power
- Such a pair of beams is formed out of each of the two arrays per sector.
- Method II illustrated in Fig. 8, is a preferred embodiment and may be
- the measurements are restricted only to the angular sub-sector covered by the
- delay switching as used in the patents referenced below, is not applicable here since delay is acquired from the BS, and these measurement beams do not enter the BS.
- FIG. 10 and 11 an alternative implementation of the two-column array with a cascade arrangement of phase-shifters is shown. This arrangement allows the use of
- integral dynamically controlled coverage shaping units which include LNAs and phase- shifters.
- the difference between the two embodiments in Fig. 10 and 11 is in the structure of the coverage shaping units that are employed: a unit with a single LNA
- phase-shifter or a unit with a pair of LNAs, each followed with an independent phase-shifter.
- phase-shifter or a unit with a pair of LNAs, each followed with an independent phase-shifter.
- the circular element 100 is a controlled phase shifter.
- Another implementation may be provided of an antenna that uses two arrays,
- EIRP effective isotropic radiated power
- G/T gain/transmit
- load measurement schemes in reverse and forward links are presented that may serve as inputs to the control algorithms.
- a controlled coverage mechanism is set forth formed by steering beams and by applying the transmit diversity.
- the load is
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002255225A AU2002255225A1 (en) | 2001-01-29 | 2002-01-29 | Antenna arrangements for flexible coverage of a sector in a cellular network |
US10/470,467 US20040063467A1 (en) | 2001-01-29 | 2002-01-29 | Antenna arangements for flexible coverage of a sector in a cellular network |
EP02724566A EP1356540A2 (en) | 2001-01-29 | 2002-01-29 | Antenna arrangements for flexible coverage of a sector in a cellular network |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US26432501P | 2001-01-29 | 2001-01-29 | |
US60/264,325 | 2001-01-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002061878A2 true WO2002061878A2 (en) | 2002-08-08 |
WO2002061878A3 WO2002061878A3 (en) | 2002-12-05 |
Family
ID=23005547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2002/001525 WO2002061878A2 (en) | 2001-01-29 | 2002-01-29 | Antenna arrangements for flexible coverage of a sector in a cellular network |
Country Status (4)
Country | Link |
---|---|
US (1) | US20040063467A1 (en) |
EP (1) | EP1356540A2 (en) |
AU (1) | AU2002255225A1 (en) |
WO (1) | WO2002061878A2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6922169B2 (en) | 2003-02-14 | 2005-07-26 | Andrew Corporation | Antenna, base station and power coupler |
WO2008023332A2 (en) * | 2006-08-21 | 2008-02-28 | Koninklijke Philips Electronics N.V. | Space-time/space-frequency coding for multi-site and multi-beam transmission |
EP1971043A1 (en) | 2007-03-16 | 2008-09-17 | Sony Deutschland GmbH | Transmitting device and method for transmitting signals in a wireless communication system, receiving device and method for receiving signals in a wireless communication system |
Families Citing this family (16)
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US8043224B2 (en) | 2000-07-12 | 2011-10-25 | Dimicine Research It, Llc | Telemedicine system |
US6949073B2 (en) | 2002-10-03 | 2005-09-27 | Home-Medicine.Com, Inc. | Dyspnea monitor, and telemedicine system and method |
KR100485516B1 (en) * | 2002-04-22 | 2005-04-27 | 주식회사 케이티프리텔 | Basestation and method for receiving and processing signal in the basestation |
US7236808B2 (en) * | 2002-09-09 | 2007-06-26 | Interdigital Technology Corporation | Vertical dynamic beam-forming |
US7245939B2 (en) * | 2002-09-09 | 2007-07-17 | Interdigital Technology Corporation | Reducing the effect of signal interference in null areas caused by overlapping antenna patterns |
US20050272472A1 (en) * | 2004-05-27 | 2005-12-08 | Interdigital Technology Corporation | Wireless communication method and system for forming three-dimensional control channel beams and managing high volume user coverage areas |
US20060084474A1 (en) * | 2004-10-18 | 2006-04-20 | Interdigital Technology Corporation | Method and system for managing a cell sectorized by both an angle in azimuth and a distance from a base station |
US8265635B2 (en) * | 2005-12-09 | 2012-09-11 | Nec Corporation | Method for determining positioning accuracy based on origination and receiving terminals and positioning device and program therefor |
US8560018B2 (en) * | 2005-12-09 | 2013-10-15 | Samsung Electronics Co., Ltd. | Flexible sectorization in wireless communication systems |
US20090190485A1 (en) * | 2008-01-30 | 2009-07-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Method of Closed Loop Power Control Adjusted by Self-Interference |
US9190715B2 (en) * | 2010-01-19 | 2015-11-17 | Quintel Technology Limited | Method and apparatus for antenna radiation pattern sweeping |
US9042323B1 (en) | 2013-01-18 | 2015-05-26 | Sprint Spectrum L.P. | Method and system of activating a global beam in a coverage area |
US10285083B2 (en) | 2013-07-12 | 2019-05-07 | Lg Electronics Inc. | Method and apparatus for transmitting indication of cell coverage in wireless communication system |
CN203521615U (en) * | 2013-10-28 | 2014-04-02 | 华为技术有限公司 | Base station antenna |
US10205491B2 (en) * | 2015-09-28 | 2019-02-12 | Futurewei Technologies, Inc. | System and method for large scale multiple input multiple output communications |
US10284271B1 (en) * | 2018-03-31 | 2019-05-07 | Steradian Semiconductors Private Limited | Method, system and device for providing phase shifted signals to an array of antennas for beam steering |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5437055A (en) * | 1993-06-03 | 1995-07-25 | Qualcomm Incorporated | Antenna system for multipath diversity in an indoor microcellular communication system |
US6016123A (en) * | 1994-02-16 | 2000-01-18 | Northern Telecom Limited | Base station antenna arrangement |
EP1014485A1 (en) * | 1998-07-13 | 2000-06-28 | Ntt Mobile Communications Network Inc. | Adaptive array antenna |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4573050A (en) * | 1983-02-17 | 1986-02-25 | The United States Of America As Represented By The Secretary Of The Navy | Dual scan rate radar |
KR100305538B1 (en) * | 1992-12-01 | 2001-11-22 | 다치카와 게이지 | Multi beam antenna device |
US5486835A (en) * | 1994-10-31 | 1996-01-23 | University Corporation For Atmospheric Research | Low cost telemetry receiving system |
US6094166A (en) * | 1996-07-16 | 2000-07-25 | Metawave Communications Corporation | Conical omni-directional coverage multibeam antenna with parasitic elements |
US6104343A (en) * | 1998-01-14 | 2000-08-15 | Raytheon Company | Array antenna having multiple independently steered beams |
US6178333B1 (en) * | 1998-04-15 | 2001-01-23 | Metawave Communications Corporation | System and method providing delays for CDMA nulling |
US6181276B1 (en) * | 1998-10-09 | 2001-01-30 | Metawave Communications Corporation | Sector shaping transition system and method |
US6504517B1 (en) * | 2000-09-12 | 2003-01-07 | Lucent Technologies Inc. | Variable sectorization tower top applique for base stations |
-
2002
- 2002-01-29 EP EP02724566A patent/EP1356540A2/en not_active Ceased
- 2002-01-29 WO PCT/IB2002/001525 patent/WO2002061878A2/en not_active Application Discontinuation
- 2002-01-29 AU AU2002255225A patent/AU2002255225A1/en not_active Abandoned
- 2002-01-29 US US10/470,467 patent/US20040063467A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5437055A (en) * | 1993-06-03 | 1995-07-25 | Qualcomm Incorporated | Antenna system for multipath diversity in an indoor microcellular communication system |
US6016123A (en) * | 1994-02-16 | 2000-01-18 | Northern Telecom Limited | Base station antenna arrangement |
EP1014485A1 (en) * | 1998-07-13 | 2000-06-28 | Ntt Mobile Communications Network Inc. | Adaptive array antenna |
Non-Patent Citations (2)
Title |
---|
CHO K ET AL: "Adaptive antennas employing vertical pattern control for street microcell" ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, 1998. IEEE ATLANTA, GA, USA 21-26 JUNE 1998, NEW YORK, NY, USA,IEEE, US, 21 June 1998 (1998-06-21), pages 639-642, XP010292302 ISBN: 0-7803-4478-2 * |
See also references of EP1356540A2 * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6922169B2 (en) | 2003-02-14 | 2005-07-26 | Andrew Corporation | Antenna, base station and power coupler |
WO2008023332A2 (en) * | 2006-08-21 | 2008-02-28 | Koninklijke Philips Electronics N.V. | Space-time/space-frequency coding for multi-site and multi-beam transmission |
WO2008023332A3 (en) * | 2006-08-21 | 2008-05-02 | Koninkl Philips Electronics Nv | Space-time/space-frequency coding for multi-site and multi-beam transmission |
US8665987B2 (en) | 2006-08-21 | 2014-03-04 | Koninklijke Philips N.V. | Space-time/space-frequency coding for multi-site and multi-beam transmission |
US8971458B2 (en) | 2006-08-21 | 2015-03-03 | Koninklijke Philips N.V. | Space-time/space-frequency coding for multi-site and multi-beam transmission |
EP1971043A1 (en) | 2007-03-16 | 2008-09-17 | Sony Deutschland GmbH | Transmitting device and method for transmitting signals in a wireless communication system, receiving device and method for receiving signals in a wireless communication system |
US8345532B2 (en) | 2007-03-16 | 2013-01-01 | Sony Deutschland Gmbh | Transmitting device and method for transmitting signals in a wireless communication system, receiving device and method for receiving signals in a wireless communication system |
US8773972B2 (en) | 2007-03-16 | 2014-07-08 | Sony Deutschland Gmbh | Transmitting device and method for transmitting signals in a wireless communication system, receiving device and method for receiving signals in a wireless communication system |
Also Published As
Publication number | Publication date |
---|---|
AU2002255225A1 (en) | 2002-08-12 |
EP1356540A2 (en) | 2003-10-29 |
WO2002061878A3 (en) | 2002-12-05 |
US20040063467A1 (en) | 2004-04-01 |
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